Researchers develop device that can ‘hear’ your internal voice

New headset can listen to internal vocalisation and speak to the wearer while appearing silent to the outside world

Researchers have created a wearable device that can read people’s minds when they use an internal voice, allowing them to control devices and ask queries without speaking.

The device, called AlterEgo, can transcribe words that wearers verbalise internally but do not say out loud, using electrodes attached to the skin.

“Our idea was: could we have a computing platform that’s more internal, that melds human and machine in some ways and that feels like an internal extension of our own cognition?” said Arnav Kapur, who led the development of the system at MIT’s Media Lab.

Kapur describes the headset as an “intelligence-augmentation” or IA device, and was presented at the Association for Computing Machinery’s Intelligent User Interface conference in Tokyo. It is worn around the jaw and chin, clipped over the top of the ear to hold it in place. Four electrodes under the white plastic device make contact with the skin and pick up the subtle neuromuscular signals that are triggered when a person verbalises internally. When someone says words inside their head, artificial intelligence within the device can match particular signals to particular words, feeding them into a computer.

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